Use of magnetic resonance imaging to visualize impregnation across aligned cylinders due to capillary forces

Neacsu, Valentin; Leisen, Johannes; Beckham, Haskell W.; Advani, Suresh G.

doi:10.1007/s00348-007-0251-0

Cited by 19 publications

(10 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To overcome these limitations, Magnetic Resonance Imaging (MRI) can be used to track the front flow by mapping the fluid concentration inside porous samples of cm dimensions (Leisen and Beckham, 2001). Neacsu et al (2007) carried out MRI measurements to study capillary-driven transversal flow in bundles of aligned fibers using blends of water and corn syrup with protonated liquids. The evolution of the wet portion of the fiber bundle with respect to time was obtained and compared with analytical models of fluid propagation.…”

Section: Introductionmentioning

confidence: 99%

An in situ investigation of microscopic infusion and void transport during vacuum-assisted infiltration by means of X-ray computed tomography

Vilà

Sket

Wilde

et al. 2015

Composites Science and Technology

View full text Add to dashboard Cite

In situ vacuum-assisted infiltration experiments were carried out using synchrotron X-ray computed tomography (SXCT) to study the mechanisms of microfluid flow within a fiber tow. A single tow of E glass fibers was infused with a water and syrup blend using an apparatus designed and built for this purpose. The high resolution of the SXCT images allows the detailed reconstruction of individual fibers within the tow while the contrast between the different phases (air, fluid and fibers) was enough to track the fluid front position and shape as well as the void transport during infiltration. The ability of this technique to provide detailed information of microfluid flow and void transport in composite materials is clearly established. The fluid propagation at the microscopic level as well as the mechanisms of void transport within the tow were related to the wetting between the fluid and the fibers, the rheological properties of the fluid and the local microstructural details (fiber

show abstract

Section: Introductionmentioning

confidence: 99%

An in situ investigation of microscopic infusion and void transport during vacuum-assisted infiltration by means of X-ray computed tomography

Vilà

Sket

Wilde

et al. 2015

Composites Science and Technology

View full text Add to dashboard Cite

show abstract

“…The main drawback is related to their modest spatial resolution, which can only track the macroscopic averaged resin flow, neglecting the local distribution at the intra and inter-tow level. To overcome these problems, Magnetic Resonance Imaging methods (MRI) can be used to track the front flow by mapping the fluid concentration inside porous samples, including different fiber preforms [55][56][57]. For instance, MRI measurements were used to study capillary driven transversal flow in bundles of aligned fibers using blends of water and corn syrup containing protonated liquids [55].…”

Section: Innovative Liquid Mouldingmentioning

confidence: 99%

Structural composites for multifunctional applications: Current challenges and future trends

González

Vilatela

Molina-Aldareguía

et al. 2017

Progress in Materials Science

236

132

View full text Add to dashboard Cite

This review paper summarizes the current state-of-art and challenges for the future developments of fiber-reinforced composites for structural applications with multifunctional capabilities. After a brief analysis of the reasons of the successful incorporation of fiberreinforced composites in many different industrial sectors, the review analyzes three critical factors that will define the future of composites. The first one is the application of novel fiberdeposition and preforming techniques together with innovative liquid moulding strategies, which will be combined by optimization tools based on novel multiscale modelling approaches, so fiber-reinforced composites with optimized properties can be designed and manufactured for each application. In addition, composite applications will be enhanced by the incorporation of multifunctional capabilities. Among them, electrical conductivity, energy storage (structural supercapacitors and batteries) and energy harvesting (piezoelectric and solar energy) seem to be the most promising ones.

show abstract

“…Among the new monitoring technologies proposed in the scientific literature, magnetic resonance imaging (MRI) has received considerable attention in the textile and polymer composite industry. For example, Leisen and Beckham, 25 Neacsu et al, 26 and Endruweit et al 27 used this imaging technology to visualize liquid flows in engineering textiles and in porous cylindrical samples representing fiber tows. This non-invasive technique provides high spatial and time resolution and allows acquiring two-dimensional (2D) images of the saturation domain every few seconds.…”

Section: Literature Reviewmentioning

confidence: 99%

Experimental study of saturation by visible light transmission in dual-scale fibrous reinforcements during composite manufacturing

Lebel

Ruíz

Trochu

2017

Journal of Reinforced Plastics and Composites

View full text Add to dashboard Cite

A new in situ monitoring strategy is proposed to study void formation during real-time impregnation of dual-scale fibrous reinforcements in liquid composite molding. Void content data from burn-off tests are used to calibrate a refractive index matching approach based on two optical principles: Beer–Lambert and Fresnel laws. Once calibrated, this approach based on visible light transmission is used to study the impact of key process parameters on the saturation footprint of dual-scale fibrous reinforcements during and after mold filling. The injection parameters investigated are the flow front velocity, the pressure distribution inside the mold cavity, the bleeding flow rate, and the mold packing pressure. The experimental setup is a computer-assisted injection system and a transparent resin transfer molding mold is used to perform unidirectional injections. A vinyl ester resin is injected through E-glass bidirectional non-crimp fabrics under various manufacturing conditions. This investigation not only confirms the decreasing trend in void formation by mechanical entrapment of air with the decrease in impregnation velocity, as it converges toward the optimal impregnation conditions for this fibrous reinforcement reported in previous studies, but it also brings insights on void dissolution and transport in liquid composite molding.

show abstract

Use of magnetic resonance imaging to visualize impregnation across aligned cylinders due to capillary forces

Cited by 19 publications

References 27 publications

An in situ investigation of microscopic infusion and void transport during vacuum-assisted infiltration by means of X-ray computed tomography

An in situ investigation of microscopic infusion and void transport during vacuum-assisted infiltration by means of X-ray computed tomography

Structural composites for multifunctional applications: Current challenges and future trends

Experimental study of saturation by visible light transmission in dual-scale fibrous reinforcements during composite manufacturing

Contact Info

Product

Resources

About